GCN Circular 43101
Subject
GRB 251214A: GECAM-B observation of a likely long burst
Event
Date
2025-12-15T01:08:35Z (a day ago)
Edited On
2025-12-15T14:34:30Z (12 hours ago)
From
Xinghao Luo at SVOM/GRN <2952704891@qq.com>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Xinghao Luo at SVOM/GRN <2952704891@qq.com>
Via
Web form
Xing-Hao Luo, Chen-Wei Wang, Shao-Lin Xiong (IHEP) report on behalf of GECAM team:
GECAM-B was triggered on-ground by GRB 251214A, at 2025-12-14T00:11:15.200 UTC (denoted as T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #43085).
According to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of multiple pulses with a duration (T90) of 5.0 +1.0/-2.5s.
The GECAM-B light curve can be found here:
https://www.bursthub.cn//admin/static/gecambgrb251214A.png
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission originally consists of two micro-satellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).